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Mesoporous alumina ceramic coated diaphragm and preparation method thereof

A mesoporous alumina and ceramic coating technology, which is applied to electrochemical generators, structural parts, electrical components, etc., can solve the problems of insufficient liquid absorption and liquid retention capacity of alumina ceramic diaphragms, achieve high pore capacity, improve Effects of improving electrical performance, liquid absorption capacity, and liquid retention capacity

Inactive Publication Date: 2020-11-20
FOSHAN YINGBOLAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art above, the object of the present invention is to provide a mesoporous alumina ceramic coated diaphragm and its preparation method, aiming to solve the problem of insufficient liquid absorption and liquid retention capacity of the existing alumina ceramic diaphragm

Method used

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  • Mesoporous alumina ceramic coated diaphragm and preparation method thereof
  • Mesoporous alumina ceramic coated diaphragm and preparation method thereof
  • Mesoporous alumina ceramic coated diaphragm and preparation method thereof

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preparation example Construction

[0040] Further, in order to obtain the mesoporous alumina ceramic coated diaphragm, the present invention provides a method for preparing the above diaphragm, comprising the following preparation steps:

[0041] S001, synthesis of NH 2 -MIL-53(Al), NH 2 - At least one of MIL-101(Al), Al-PCP;

[0042] S002, performing heat treatment on the Al-based MOFs material obtained in step S001 to obtain mesoporous alumina powder;

[0043] S003, stirring and mixing water, dispersant, thickener and the mesoporous alumina powder obtained in step S002, and grinding after mixing evenly;

[0044] S004, adding an adhesive and a wetting agent to the grinding material obtained in step S003, and stirring evenly to obtain a mesoporous alumina ceramic coating slurry;

[0045] S005. Coating the mesoporous alumina ceramic coating slurry obtained in step S004 on one or both sides of a commercially available diaphragm through a coating machine, drying and removing moisture to obtain a mesoporous alumin...

Embodiment 1

[0065] (1) Add 1.5g of aluminum nitrate nonahydrate, 0.432g of 1,4-naphthalene dicarboxylic acid and 40mL of deionized water into a hydrothermal reaction kettle with 100mL of water and stir at room temperature for 1h. After mixing evenly, seal the hydrothermal reaction kettle and Place it in a blast drying oven, keep it warm at 180°C for 24 hours, and synthesize Al-PCP material by hydrothermal reaction;

[0066] (2) After the reaction time was reached, the hydrothermal reaction kettle was naturally cooled, the hydrothermal synthesis product was suction-filtered, washed with deionized water for three times, and then dried under vacuum at 150°C for 12 hours to obtain a light yellow Al-PCP powder sample;

[0067] (3) Carry out heat treatment on the obtained Al-PCP powder sample, calcining it under nitrogen atmosphere, the heating rate is 5°C / min, keep it warm for 2 hours after reaching 600°C, and cool naturally after the heat preservation is over to obtain mesoporous alumina powde...

Embodiment 2

[0073] (1) Add 1.5g of aluminum nitrate nonahydrate, 0.432g of 1,4-naphthalene dicarboxylic acid and 40mL of deionized water into a hydrothermal reaction kettle with 100mL of water and stir at room temperature for 1h. After mixing evenly, seal the hydrothermal reaction kettle and Place it in a blast drying oven, keep it warm at 180°C for 24 hours, and synthesize Al-PCP material by hydrothermal reaction;

[0074] (2) After the reaction time was reached, the hydrothermal reaction kettle was naturally cooled, the hydrothermal synthesis product was suction-filtered, washed with deionized water for three times, and then dried under vacuum at 150°C for 12 hours to obtain a light yellow Al-PCP powder sample;

[0075] (3) Carry out heat treatment on the obtained Al-PCP powder sample, calcining in the air atmosphere, the heating rate is 5 ° C / min, after reaching 700 ° C, heat preservation for 2 hours, after the heat preservation is completed, naturally cool to obtain the mesoporous al...

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Abstract

The invention discloses a mesoporous alumina ceramic coated diaphragm and a preparation method thereof, and belongs to the technical field of diaphragms for lithium ion batteries. The mesoporous alumina ceramic coated diaphragm comprises a commercially available diaphragm and mesoporous alumina coated on one side or two sides of the commercially available diaphragm, wherein the mesoporous aluminais generated by carrying out heat treatment on an Al-based MOFs porous coordination polymer material, and the Al-based MOFs porous coordination polymer material is at least one of NH2-MIL-53 (Al), NH2-MIL-101 (Al) and Al-PCP. According to the invention, the liquid absorption capacity and the liquid retention capacity of the mesoporous alumina ceramic coated diaphragm are improved, and the electrical property of the lithium ion battery can be obviously improved when the mesoporous alumina ceramic coated diaphragm is applied to the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of diaphragms for lithium-ion batteries, in particular to a mesoporous alumina ceramic-coated diaphragm and a preparation method thereof. Background technique [0002] In a lithium-ion battery, the separator has two main functions: first, the separator is an electronically insulating polymer functional material, which can separate the positive and negative electrodes of the battery to avoid direct contact between the two electrodes and cause a short circuit; second, The separator has a large number of zigzag through micropores, which can allow lithium ions in the electrolyte to freely pass through the micropores, migrate between the positive and negative electrodes to form a circuit, and the electrons form an electric current through the external circuit, which is provided to the electrical equipment. [0003] Existing polyolefin microporous membranes prepared by two processes, dry and wet, such as polyethyl...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M2/14H01M10/0525
CPCH01M10/0525Y02E60/10
Inventor 涂文成彭海生张泰发
Owner FOSHAN YINGBOLAI TECH
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